CN203933012U - A kind of novel electric quantity metering shore electric power device - Google Patents
A kind of novel electric quantity metering shore electric power device Download PDFInfo
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- CN203933012U CN203933012U CN201420323118.3U CN201420323118U CN203933012U CN 203933012 U CN203933012 U CN 203933012U CN 201420323118 U CN201420323118 U CN 201420323118U CN 203933012 U CN203933012 U CN 203933012U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/10—Flexible AC transmission systems [FACTS]
Abstract
The utility model discloses a kind of novel electric quantity metering shore electric power device, comprising: variable-frequency variable-voltage power supply device, junction box, external electrical network is connected with junction box by variable-frequency variable-voltage power supply device; Junction box connects outside boats and ships; Variable-frequency variable-voltage power supply device comprises: phase shifting transformer, power cell, filter, metering device, and external electrical network is connected with power cell by phase shifting transformer; Power cell is connected with metering device by filter; Metering device is connected with junction box.Novel electric quantity metering shore electric power device of the present utility model, adopt high voltage converter, reduced the quantity (low-voltage variable frequency need to adopt step-down transformer step-down, needs to adopt step-up transformer to boost after frequency conversion output) of transformer, therefore reduce power loss, improved power supplying efficiency.
Description
Technical field
The utility model relates to power technology electrical domain, particularly a kind of novel electric quantity metering shore electric power device.
Background technology
Large ship adopts fuel oil goods (mostly being heavy oil and diesel oil) generating when particularly oil carrier and container ship reach port conventionally, meets boats and ships need for electricity.The fuel oil such as heavy oil and diesel oil goods produce a large amount of sulfide and nitrogen oxide in combustion process, and surrounding environment is caused to severe contamination, after pollution, by airflow function, can propagate into several hundred kilometers area in addition.And lot of domestic and international port district all concentrates on urban district, to port ship berthing at harbour, produce the contradiction of polluting with inner city environmental protection more and more outstanding.If adopt land electrical network to the ship power supply that reaches port, for protection port district environment, the clean pleasant green harbour of construction, tool is of great significance undoubtedly.
Because China's port and pier electric power system mains frequency is 50Hz, and lot of domestic and international large ship all adopts the boats and ships electrical equipment of 60Hz, if adopt land mains supply, the difference of harbour and ship power supply electricity system certainly will cause and have a strong impact on marine electric installation.
Global Oil resource is day by day exhausted, and oil price soars all the way, and boats and ships cost of electricity-generating is also increasing always, adopts bank power technology not only can reduce environmental pollution, simultaneously can be for boats and ships generating reduces costs, for harbour increases benefit.That the utilization of bank power technology can reach is energy-conservation, the effect of reduction of discharging, noise reduction, can create very high economic benefit, therefore from now on one period ship shore electric technology will be developed fast, numerous harbours will configure ship shore electric facility, the measurement problem of ship shore electric electric weight is brought into schedule for this reason, and it is reported the domestic research that seldom has company to specialize in ship shore electric electric power meter.
For large ship, on ship, various electric equipments are larger to workload demand, take 3000kV as example, for meeting the power demands of land electrical network to the boats and ships that reach port, someone has proposed a kind of low-pressure high-power shore electric power scheme, and its principle is that the high-tension electricity of electrical network three-phase 50Hz is first adopted to transformer pressure-reducing is 380v/50Hz, then input low pressure shore electric power, through low pressure inversion system commutation inversion, be 60Hz output, and then after power transformer boosts to high pressure 60Hz, give the ship power supply that reaches port.This low pressure bank power technology exists following shortcoming:
1, in low pressure bank power technology; large power inverter power source all adopts the mode of small-power Inverter parallel connection to realize; for capacity up to for the shore electric power of several megawatts; require inversion module in parallel numerous; the fault of any one module; all make shore electric power derate to use, even shut down.And because the complexity of boats and ships load often need to be with heavy-duty motor directly to start, strong to power surges, therefore, low pressure inversion scheme reliability reduces;
2, in low pressure shore electric power technology, power supply input side needs step-down transformer step-down, after inversion, need sinusoidal wave filtering, finally also to after boosting, step-up transformer just can obtain high voltage, and ascending, descending pressure transformer generally adopts power transformer, it is most effective is 95%, sine wave filter efficiency 90%, make power supply overall efficiency be up to 85%, greatly reduce system effectiveness;
3, general 6 impulse commutations that adopt of low pressure inversion transformation technique, input power factor is low, to electrical network, will form larger pollution;
4, in low pressure bank power technology, the shore electric power for capacity up to several megawatts, its specified input current is thousands of amperes, has brought a lot of difficulties to input and output side distribution design.
Current shipping shore power system does not have good treating method aspect metering, if adopt the mode in the metering of system input side, the electric equipments such as phase shifting transformer, high voltage converter, junction box due to centre, have been passed through, these electric equipments are inevitably with lossy, and metering result is not often approved by user; If adopt the mode in the metering of system outlet side,, owing to there being the conversion of frequency, traditional electric energy meter can not measure the electric energy of 50Hz/60Hz simultaneously.
Utility model content
For solve in prior art, exist cannot carry out the effectively problem of metering to ship shore electric process, the utility model proposes a kind of novel electric quantity metering shore electric power device.
Novel electric quantity metering shore electric power device of the present utility model, comprising: variable-frequency variable-voltage power supply device, junction box, and external electrical network is connected with junction box by variable-frequency variable-voltage power supply device; Junction box connects outside boats and ships;
Variable-frequency variable-voltage power supply device comprises: phase shifting transformer, power cell, filter, metering device, and external electrical network is connected with power cell by phase shifting transformer; Power cell is connected with metering device by filter; Metering device is connected with junction box.
In technique scheme, also comprise: cable reel, junction box is connected with outside boats and ships by cable reel.
In technique scheme, metering device and outer monitoring center communicate.
In technique scheme, metering device comprises voltage transformer, current transformer, power transducer, power analyzer, display.
In technique scheme, variable-frequency variable-voltage power supply device is output as capacity 2000kVA, 6.6kV, 60Hz/6kV, 50Hz and following.
Novel electric quantity metering shore electric power device of the present utility model, adopt high voltage converter, reduced the quantity (low-voltage variable frequency need to adopt step-down transformer step-down, needs to adopt step-up transformer to boost after frequency conversion output) of transformer, therefore reduce power loss, improved power supplying efficiency.50Hz and the 60Hz ship shore electric variable frequency power supply of two kinds of electricity systems can be provided, can take into account to the power supply of a plurality of berths simultaneously.By adjusting and customizing frequency-converter power analyzer, the equipment such as voltage transformer, current transformer, power transducer and power analyzer are integrated, make it to become a frequency conversion electric power meter that meets boats and ships shore-based power supply power supply user's request (50Hz/60Hz) and handled easily use, solved the problem of ship shore electric electric quantity metering.Adopt and concentrate modes of emplacement, can be optimized configuration according to harbour total demand, the system expandability is high, and upgrading is convenient.
Accompanying drawing explanation
Fig. 1 is the structural representation of novel electric quantity metering shore electric power device of the present utility model;
Fig. 2 is the assembling schematic diagram of variable-frequency variable-voltage power supply device of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, several embodiments of the present utility model are described in detail, but are to be understood that protection range of the present utility model is not subject to the restriction of embodiment.
For solve in prior art, exist cannot carry out the effectively problem of metering to ship shore electric process, the utility model proposes a kind of novel electric quantity metering shore electric power device.
As shown in Figure 1, novel electric quantity metering shore electric power device of the present utility model comprises: variable-frequency variable-voltage power supply device, junction box 5, and external electrical network is connected with junction box 5 by variable-frequency variable-voltage power supply device; Junction box 5 connects outside boats and ships;
Variable-frequency variable-voltage power supply device comprises: phase shifting transformer 1, power cell 2, filter 3, metering device 4, and external electrical network is connected with power cell 2 by phase shifting transformer 1; Power cell 2 is connected with metering device 4 by filter 3; Metering device 4 is connected with junction box 5.
Preferably, also comprise: cable reel 66, junction box 5 is connected with outside boats and ships by cable reel 66.
Preferably, metering device 4 communicates with outer monitoring center.
Preferably, metering device 4 comprises voltage transformer, current transformer, power transducer, power analyzer, display.
Preferably, variable-frequency variable-voltage power supply device is output as capacity 2000kVA, 6.6kV, 60Hz/6kV, 50Hz and following.
The utility model is the high pressure mode of going on board, and adopts stationary structure on the bank, and power supply capacity is 2000kVA, and power acquisition is inputted with 10kV/50Hz, and 6.6kV, 60Hz/6kV, 50Hz output, be the ship power supply that reaches port.Delivery of electrical energy flows to: external electrical network → variable-frequency variable-voltage power supply device → power-on box 5 → cable reel, 66 → boat-carrying transformer (6kV/0.4kV) → boat-carrying grid-connection cabinet → boats and ships.
The assembling schematic diagram that is illustrated in figure 2 variable-frequency variable-voltage power supply device, comprising: phase shifting transformer 1, power cell 2, filter 3, metering device 4, incoming line cabinet, control cubicle, metering cabinet, outgoing line cabinet and blower fan.Incoming line cabinet is for the frequency conversion input of external power source; Control cubicle is with having the functions such as overload, short circuit, open-phase protection; The integrated above-mentioned voltage transformer of metering cabinet, current transformer, power transducer, power analyzer, for gathering and analyze voltage, electric current, power; Outgoing line cabinet is for exporting electric energy to load; Blower fan is for carrying out cooling to whole device; Metering cabinet also comprises display, for the metering results such as voltage, electric current, power are shown.Metering device 4 of the present utility model can quick metering 50Hz/60Hz electric energy, adopt the mode in output side transducer metering, gauge position is moderate rationally, can not produce larger error in dipping.
Novel electric quantity metering shore electric power device operation principle of the present utility model is as follows: external electric energy, through phase shifting transformer 1 output, is then passed through power cell 2 and filter 3, carries out respectively frequency conversion and filtering; The frequency-converter power transmitter of metering device 4 gathers the three-phase electric quantity signal of power cell 2 outputs, Optical Fiber Transmission is to frequency-converter power analyzer, the electric quantity signal collecting is analyzed in the real-time operation of frequency-converter power analyzer, draws transient power value and other electrical energy parameters, and shows in real time.
On metering device 4, can also customize " timing start/end " key, " beginning key " triggers rear frequency-converter power analyzer transient power value started to integral operation, draws energy value, and calculating process lasts till that triggering " end " key stops.Electric energy measurement is communicated by letter with Surveillance center by Ethernet interface, realizes data sharing.By the panel button of frequency-converter power analyzer is adjusted and customized, the said equipment is integrated, make it to become one and meet consumers' demand and frequency conversion electric energy metering cabinet that handled easily is used.
Novel electric quantity metering shore electric power device of the present utility model is described as follows:
Phase shifting transformer 1, phase shifting transformer 1 is a kind of of rectifier transformer.The single-phase electric action of rectifying device, causes the distortion of rectifier transformer alternating magnetic field waveform; The size of distortion is decided by that D.C. capacity accounts for the ratio of net capacity and the frequency of the harmonic current in inflow electrical network, and harmonic number.One of effective way that suppresses harmonic wave is by phase shift is carried out in rectifier transformer high-pressure side, and this way can be eliminated the low-order harmonic that amplitude is larger substantially.
Phase shifting transformer 1 can realize eliminate most of by the caused harmonic current of single power cell 2, so the harmonic wave total content of input current, much smaller than the requirement of national standard 5%, and can guarantee that input power factor is close to 1.
Power cell 2, preferred, power cell 2 is high voltage converter, by a plurality of power cells 2, is composed in series, and can realize the frequency translation to input electric energy.Frequency converter is application converter technique and microelectric technique, controls the electric control appliance of alternating current motor by changing machine operation supply frequency mode.Frequency converter is mainly comprised of rectification (AC-DC), filtering, inversion (direct current becomes interchange), brake unit, driver element, detecting unit microprocessing unit etc.Voltage and the frequency of cut-offfing to adjust out-put supply of the inner IGBT of portion of frequency converter, provide its needed supply voltage according to the actual needs of motor, and then reach object energy-conservation, speed governing.
Filter 3, harmonic wave can have influence on the quality of power supply, and then directly affects the stable and life-span of use equipment.Therefore, must adopt adequate measures to suppress harmonic wave, what is called is exactly suitably harmonic suppressing method simple in structure, cost is low.Filter 3 is analyzed for the frequency characteristic to circuit, eliminates the humorous wave interference producing in circuit transmission process.
Metering device 4, for measuring and analyze the parameters such as the output voltage that installs after filtering after 3, electric current, frequency, and transmits outer monitoring center by above-mentioned parameter.Metering device 4 can adopt the metering device of prior art, metering device 4 comprises: voltage transformer, current transformer, power transducer, power analyzer, display, above-mentioned voltage transformer, current transformer, power transducer, power analyzer, display all can adopt instrument of the prior art.。
Junction box 5, and junction box 5 is a kind of electric power auxiliary equipment, and the electric energy through the conversion of variable-frequency variable-voltage power supply device, need flow to electricity consumption side's (being boats and ships) by junction box 5 and power.
Cable reel 6, for solving the cable convergent-divergent problem of bank electric process.Cable reel 6 comprises frame, is provided with volume car and cable-remover in frame, and volume car comprises reel and motor, and reel is connected to and is fixed in frame, and motor is connected with main shaft, and cable-remover is located at the front portion of reel.
The electric energy of novel electric quantity metering shore electric power device output of the present utility model is when the outside boats and ships of access, need to pass through successively boat-carrying transformer and boat-carrying grid-connection cabinet, boat-carrying transformer, for the voltage for applicable marine electric installation instructions for use by the voltage transition of input; Boat-carrying grid-connection cabinet, grid-connected for realizing the heat of ship shore electric.
Novel electric quantity metering shore electric power device of the present utility model, adopt high voltage converter, reduced the quantity (low-voltage variable frequency need to adopt step-down transformer step-down, needs to adopt step-up transformer to boost after frequency conversion output) of transformer, therefore reduce power loss, improved power supplying efficiency.50Hz and the 60Hz ship shore electric variable frequency power supply of two kinds of electricity systems can be provided, can take into account to the power supply of a plurality of berths simultaneously.By adjusting and customizing frequency-converter power analyzer, the equipment such as voltage transformer, current transformer, power transducer and power analyzer are integrated, make it to become a frequency conversion electric power meter 4 that meets boats and ships shore-based power supply power supply user's request (50Hz/60Hz) and handled easily use, solved the problem of ship shore electric electric quantity metering.Adopt and concentrate modes of emplacement, can be optimized configuration according to harbour total demand, the system expandability is high, and upgrading is convenient.
Disclosed is above only several specific embodiment of the present utility model, and still, the utility model is not limited thereto, and the changes that any person skilled in the art can think of all should fall into protection range of the present utility model.
Claims (4)
1. a novel electric quantity metering shore electric power device, is characterized in that, comprising: variable-frequency variable-voltage power supply device, junction box, and external electrical network is connected with described junction box by described variable-frequency variable-voltage power supply device; Described junction box connects outside boats and ships;
Described variable-frequency variable-voltage power supply device comprises: phase shifting transformer, power cell, filter, metering device, and external electrical network is connected with described power cell by described phase shifting transformer; Described power cell is connected with described metering device by described filter; Described metering device is connected with described junction box.
2. novel electric quantity metering shore electric power device according to claim 1, is characterized in that, also comprises: cable reel, described junction box is connected with outside boats and ships by described cable reel.
3. novel electric quantity metering shore electric power device according to claim 1, is characterized in that, described metering device and outer monitoring center communicate.
4. novel electric quantity metering shore electric power device according to claim 1, is characterized in that, described metering device comprises voltage transformer, current transformer, power transducer, power analyzer, display.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420323118.3U CN203933012U (en) | 2014-06-17 | 2014-06-17 | A kind of novel electric quantity metering shore electric power device |
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| CN201420323118.3U CN203933012U (en) | 2014-06-17 | 2014-06-17 | A kind of novel electric quantity metering shore electric power device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104934975A (en) * | 2015-07-02 | 2015-09-23 | 江苏安方电力科技有限公司 | High-voltage frequency conversion marine shore power system |
| CN108565859A (en) * | 2018-05-24 | 2018-09-21 | 卧龙电气集团辽宁荣信高科电气有限公司 | A kind of adaptation ship or so string is powered bank base frequency-converting power supply |
-
2014
- 2014-06-17 CN CN201420323118.3U patent/CN203933012U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104934975A (en) * | 2015-07-02 | 2015-09-23 | 江苏安方电力科技有限公司 | High-voltage frequency conversion marine shore power system |
| CN108565859A (en) * | 2018-05-24 | 2018-09-21 | 卧龙电气集团辽宁荣信高科电气有限公司 | A kind of adaptation ship or so string is powered bank base frequency-converting power supply |
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